uxcell Laptop Skype MSN 3.5mm Earbuds Wireless Tie Head Microphone Set WR-601 Product Name : Wireless Tie Head Microphone;Material : Plastic;Color : Black Modulation Mode : FM;Output Impedance : 600&omega;;Distortion : &le;0.5% Effective Distance : about 30m;Transmitter/Receiver Frequency : 114MHz-116MHz Frequency Response : 80Hz-12500Hz;Connector Diameter : 3.5mm Weight : 222g;Package Content : 1 x Clip-On Lapel / Lavaliere Microphone1 x Belt Clip (Body Pack) Transmitter1 x Wireless Receiver1 x Instructions